What's the deal with my gas tank. I ran out of gas the other day. put 2
gal in, drove 1 block. filled the tank 12 1/2 gal. That's 14 1/2 gal
total.   I thought the tank in these was 16 gal. or is this like the
propane tank that's supposed to hold 3 gal but only holds 2.3 gal. Does
the reserve tank have a secret lever to pull, hidden somewhere.